I have a 90 gallon fowlr working up to a reef. The tank has been set-up for 7 to 8 weeks. I have a 90# lr, royal gramma, 2 perc, 1 yellow clown goby, yellow watchman goby and misc. snails crabs and shrimp. Water parameters are ammonia 0, nitrites 0, nitrates 0-5, ph 8.1 and salanity 1.024. The...